Factors influencing fish distribution and community structure in a small coastal river in southwestern Costa Rica

Hydrobiologia ◽  
1990 ◽  
Vol 203 (1-2) ◽  
pp. 1-14 ◽  
Author(s):  
John Lyons ◽  
Daniel W. Schneider
Keyword(s):  
Community Structure ◽  
Costa Rica ◽  
Fish Distribution ◽  
Factors Influencing ◽  
Coastal River

Factors influencing community structure in a South American tank bromeliad fauna

Oikos ◽  
2002 ◽  
Vol 96 (2) ◽  
pp. 225-234 ◽  
Author(s):  
Peter Armbruster ◽  
Robert A. Hutchinson ◽  
Peter Cotgreave
Keyword(s):  
Community Structure ◽  
South American ◽  
Factors Influencing ◽  
Tank Bromeliad

scholarly journals Factors Influencing the Abundance of Pests in Production Fields and Rates of Interception of Dracaena marginata Imported From Costa Rica

2013 ◽  
Vol 106 (5) ◽  
pp. 2027-2034 ◽  
Author(s):  
Eduardo Hidalgo ◽  
Tamara Benjamin ◽  
Fernando Casanoves ◽  
Clifford Sadof
Keyword(s):  
Costa Rica ◽  
Factors Influencing

Factors influencing prokaryotic community structure composition in sub-surface coastal sediments

2012 ◽  
Vol 97 ◽  
pp. 141-148 ◽  
Author(s):  
Massimiliano Molari ◽  
Donato Giovannelli ◽  
Giuseppe d’Errico ◽  
Elena Manini
Keyword(s):  
Community Structure ◽  
Coastal Sediments ◽  
Prokaryotic Community ◽  
Factors Influencing

Distribution, biomass and community structure of demersal fishes of the Gulf of Carpentaria, Australia

1994 ◽  
Vol 45 (3) ◽  
pp. 375 ◽  
Author(s):  
SJM Blaber ◽  
DT Brewer ◽  
AN Harris
Keyword(s):  
Community Structure ◽  
Abiotic Factors ◽  
Fish Fauna ◽  
Distribution Patterns ◽  
Demersal Fish ◽  
Fish Distribution ◽  
Sediment Type ◽  
Principal Coordinates Analysis ◽  
Main Site ◽  
Principal Coordinates

The demersal fish fauna of the Gulf of Carpentaria was surveyed during November and December 1990. Over 300 species from 85 families were caught by trawling a systematic grid of 107 stations. The absolute mean biomass was 124.8 kg ha-1 (s.e. =44.1) for day trawls and 53.7 kg ha-1 (s.e. =6.0) for night trawls. The overall mean catch rates were 421.3 kg h-1 (s.e. = 128.5) for day trawls and 198.6 kg h-1 (s.e. =21.5) for night trawls. Biomasses were twice as high in the prawn-trawling grounds of Albatross Bay, the south-eastern gulf and Groote Eylandt as they were elsewhere in the gulf. Twenty-five species made up 75% of the biomass; the dominant families were Haemulidae, Carangidae, Leiognathidae and Nemipteridae. Community-structure and distribution patterns were analysed by numerical classification techniques and principal-coordinates analysis. These indicated six main site groups and 15 fish community groups, based on fish species occurrences and biomasses. There was a relationship between fish distribution patterns and depth of water but not other abiotic factors recorded (sediment type, salinity, temperature and turbidity).

scholarly journals Hydrozoan diversity on hard bottom in Kongsfjorden, Svalbard

2010 ◽  
Vol 90 (7) ◽  
pp. 1337-1352 ◽  
Author(s):  
Andrey Voronkov ◽  
Sofia D. Stepanjants ◽  
Haakon Hop
Keyword(s):  
Species Richness ◽  
Community Structure ◽  
Environmental Conditions ◽  
Depth Range ◽  
Factors Influencing ◽  
Main Factors ◽  
Abundance And Distribution ◽  
First Time

Hydroids in Kongsfjorden, Svalbard, were studied on five hard-bottom transects along gradients of environmental conditions from the glacier at the fjord's head to the fjord's mouth at depth-range 0–30 m. Hydrozoa colonies are widely distributed on rock and gravel substrata in Kongsfjorden. In general, however, hydroids are not dominant or subdominant in zoobenthic communities. The exception isSymplectoscyphus tricuspidatusvar.acuminatus, colonies of which were sometimes abundant enough to determine the community structure and characteristics of benthic diversity. Of the 23 species recorded in this study,Laomedea flexuosa,Phialella quadrataandHalecium tenellumas well as representatives of family Stylasteridae were recorded from Svalbard waters for the first time. Hydroid diversity was highest in the zoobenthic community structured by branched bryozoans. The abundance and distribution of hydroids were reduced, to some extent, in the inner part of the fjord compared to the outer fjord. Species richness of hydroids was high at shallow depths, decreased at around 15 m and then increased again to 30 m depth. Species with Low-boreal–Arctic and Panoceanic distributional ranges were the most frequently occurring species. Depth, type of background substratum and amount of silt on its surface were the main factors influencing hydroid distribution. Description of all recorded taxa distributions together with data on their habitat and associations in zoobenthic communities are presented in an Appendix.

scholarly journals Cultivated and wild pearl millet display contrasting patterns of abundance and co-occurrence in their root mycobiome

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Marie-Thérèse Mofini ◽  
Abdala G. Diedhiou ◽  
Marie Simonin ◽  
Donald Tchouomo Dondjou ◽  
Sarah Pignoly ◽  
...  
Keyword(s):  
Community Structure ◽  
Pearl Millet ◽  
Relative Abundance ◽  
Fungal Community ◽  
Management Practices ◽  
Pennisetum Glaucum ◽  
Fungal Communities ◽  
Fungal Community Structure ◽  
The Core ◽  
Factors Influencing

AbstractFungal communities associated with roots play a key role in nutrient uptake and in mitigating the abiotic and biotic stress of their host. In this study, we characterized the roots mycobiome of wild and cultivated pearl millet [Pennisetum glaucum (L.) R. Br., synonym: Cenchrus americanus (L.) Morrone] in three agro-ecological areas of Senegal following a rainfall gradient. We hypothesized that wild pearl millet could serve as a reservoir of endophytes for cultivated pearl millet. We therefore analyzed the soil factors influencing fungal community structure and whether cultivated and wild millet shared the same fungal communities. The fungal communities associated with pearl millet were significantly structured according to sites and plant type (wild vs cultivated). Besides, soil pH and phosphorus were the main factors influencing the fungal community structure. We observed a higher fungal diversity in cultivated compared to wild pearl millet. Interestingly, we detected higher relative abundance of putative pathotrophs, especially plant pathogen, in cultivated than in wild millet in semi-arid and semi-humid zones, and higher relative abundance of saprotrophs in wild millet in arid and semi-humid zones. A network analysis based on taxa co-occurrence patterns in the core mycobiome revealed that cultivated millet and wild relatives had dissimilar groups of hub taxa. The identification of the core mycobiome and hub taxa of cultivated and wild pearl millet could be an important step in developing microbiome engineering approaches for more sustainable management practices in pearl millet agroecosystems.

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